(.Effect Of Some Macro And Micro Nutrients On Growth And Yield Of Egyptian Cotton ( Gassypiem barbadebse L

Abstract

This investigation was carried out at the fann ofFac. of Agric. Zagazig Univ. at Moshtohor, Kalubia Governorate to study the effect of some macro and micronutrients on cotton growth characters, yield and its components, chemical contents of seed cotton and fiber properties during 1993 and 1994 season. Giza 85 (Mubarak) cultivar was used as an experimental material.

The experimental treatments consisted of 0, 45, 90 kg N/

feddan and 0, 16 kg P205/ feddan and 0, 1000, 1500 ppm Fe and

Zn.

Nitrogen fertilizer was applied in form of ammonium nitrate (33.5

% N) after thinning process and before irrigation.

Phosphorus in the form of calcium superphosphate (15.% P205)

was applied at sowing date.

Micronutrients were applied twice as foliar spray after 45 and 90 days from sowing in the form ofNervanide ferrous (13% Fe, EDTA) and Nervanid Zinc (14 % Zn, EDTA). The design of the experiment was a split plot with 4 replications in both seasons.

The important results obtained could be summarized as follows:

I- Effect of nitrogen fertilizer:

1- The highest plant height was obtained from the highest N level (90 kgN/fed.).